<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRolesDialogVisible=true">添加角色</el-button>
        </el-col>
      </el-row>
    </el-card>
    <!-- 角色列表区 -->
    <el-table :data="rolelist" border stripe>
      <!-- 展开列 -->
      <el-table-column type="expand">
        <template slot-scope="scope">
          <el-row v-for="(item1,i1) in scope.row.children" :key="item1.id"
            :class="['bdbottom',i1===0?'bdtop':'','vcenter']">
            <!-- 渲染一级权限 -->
            <el-col :span="5">
              <el-tag closable @close="removeRightById(scope.row,item1.id)">
                {{item1.authName}}
              </el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>
            <!-- 渲染二级和三级权限 -->
            <el-col :span="19">
              <!-- 通过for循环 嵌套渲染二级权限 -->
              <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                <el-col :span="6">
                  <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                    {{item2.authName}}
                  </el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <el-col :span="18">
                  <!-- 通过for循环 嵌套渲染三级权限 -->
                  <el-tag v-for="(item3) in item2.children" :key='item3.id' type="warning" closable
                    @close="removeRightById(scope.row,item3.id)">
                    {{item3.authName}}
                  </el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
        </template>
      </el-table-column>
      <!-- 索引列 -->
      <el-table-column type="index"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作" width="300px">
        <template slot-scope="scope">
          <el-button size="mini" type="primary" icon="el-icon-edit" @click="showRoleEditDialog(scope.row.id)">编辑
          </el-button>
          <el-button size="mini" type="primary" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除
          </el-button>
          <el-button size="mini" type="primary" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
        </template>
      </el-table-column>
    </el-table>
    <!-- 添加角色的对话框 -->
    <el-dialog title="添加角色" :visible.sync="addRolesDialogVisible" width="50%" @close=addRolesDialogClosed>
      <!-- 内容主题区 -->
      <el-form :model="addRolesForm" ref="addRolesFormRef" label-width="70px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRolesForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改角色的对话框 -->
    <el-dialog title="修改角色" :visible.sync="editRolesDialogVisible" width="50%" @close="editRolesDialogClosed">
      <!-- 内容主题区 -->
      <el-form :model="editRolesForm" ref="editRolesFormRef" label-width="70px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRolesForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editRolesDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        //所有角色列表数据
        rolelist: [],
        //控制添加角色对话框的显示与隐藏
        addRolesDialogVisible: false,
        //添加角色的表单数据
        addRolesForm: {
          roleName: '',
          roleDesc: ''
        },
        //控制修改角色对话框的显示与隐藏
        editRolesDialogVisible: false,
        //查询到要修改的角色信息对象
        editRolesForm: {},
        //控制分配权限对话框的显示与隐藏
        setRightDialogVisible:false,
        //所有权限的数据
        rightslist:[],
        //树形控件的属性绑定对象
        treeProps:{
          label:'authName',
          children:'children'
        },
        //默认选中的节点Id值数组
        defKeys:[],
        //当前即将分配权限的角色Id
        roleId:''
      }
    },
    created() {
      this.getRolesList()
    },
    methods: {
      //获取所有角色的列表
      async getRolesList() {
        const {
          data: res
        } = await this.$http.get('roles')
        if (res.meta.status !== 200) {
          return this.$message.error('获取角色列表失败！')
        }
        this.rolelist = res.data
        console.log(this.rolelist)
      },
      //监听添加角色对话框的关闭事件
      addRolesDialogClosed() {
        this.$refs.addRolesFormRef.resetFields()
      },
      //点击按钮，添加新角色
      addRole() {
        this.$refs.addRolesFormRef.validate(async valid => {
          if (!valid) return
          //可以发起添加角色的网络请求
          const {
            data: res
          } = await this.$http.post('roles', this.addRolesForm)
          if (res.meta.status !== 201) {
            this.$message.error('添加角色失败！')
          }
          this.$message.success('添加角色成功！')
          //隐藏添加角色的对话框
          this.addRolesDialogVisible = false
          //重新获取角色列表数据
          this.getRolesList()
        })
      },
      //根据id删除对应的角色信息
      async removeRoleById(id) {
        //弹窗询问是否删除对应的角色信息
        const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err);
        //如果用户确认删除，则返回字符串 confirm
        //如果用户确认取消，则返回字符串 concel
        // console.log(confirmResult)
        if (confirmResult !== 'confirm') {
          return this.$message.info('已取消删除')
        }
        const {
          data: res
        } = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('删除角色失败！')
        }
        this.$message.success('删除角色成功！')
        this.getRolesList()
      },
      //获得修改的角色的信息
      async showRoleEditDialog(id) {
        const {
          data: res
        } = await this.$http.get('roles/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('查询用户信息失败')
        }
        this.editRolesForm = res.data
        this.editRolesDialogVisible = true
      },
      //监听修改角色对话框的关闭事件
      editRolesDialogClosed() {
        this.$refs.editRolesFormRef.resetFields()
      },
      //修改角色信息并提交
      editRoleInfo() {
        this.$refs.editRolesFormRef.validate(async valid => {
          if (!valid) return
          //发起修改用户信息的数据请求
          const {
            data: res
          } = await this.$http.put('roles/' + this.editRolesForm.roleId, {
            roleName: this.editRolesForm.roleName,
            roleDesc: this.editRolesForm.roleDesc
          })
          if (res.meta.status !== 200) {
            return this.$message.error('更新角色信息失败！')
          }
          //关闭对话框
          this.editRolesDialogVisible = false
          //刷新数据列表
          this.getRolesList()
          //提示修改成功
          this.$message.success('更新角色信息成功！')
        })
      },
      //根据Id删除对应的权限
      async removeRightById(role, rightId) {
        //弹框提示用户是否要删除
        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除')
        }
        const {
          data: res
        } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败！')
        }
        role.children = res.data
      },
      //展示分配权限的对话框
      async showSetRightDialog(role) {
        //获取所有权限的数据
        this.roleId=role.id
        const {data:res}= await this.$http.get('rights/tree')
        if (res.meta.status!==200) {
          return this.$message.error('获取权限数据失败')
        }
        //获取到的权限数据保存到数据中
        this.rightslist=res.data
        console.log(this.rightslist)
        //递归获取三级节点的Id
        this.getLeafKeys(role,this.defKeys)
        this.setRightDialogVisible=true
      },
      //通过递归的形式，获取角色下所有三级权限的id,并保存到defKeys数组中
      getLeafKeys(node,arr){
        //如果当前node节点不包含children属性，则是三级节点
        if (!node.children) {
          return arr.push(node.id)
        }
        node.children.forEach(item =>
          this.getLeafKeys(item,arr)
        );
      },
      //监听分配权限对话框的关闭事件
      setRightDialogClosed(){
        this.defKeys=[]
      },
      //点击为角色分配权限
      async allotRights(){
        const keys=[
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr=keys.join(',')
        const {data:res}= await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
        if (res.meta.status!==200) {
          return this.$message.error('分配权限失败')
        }
        this.$message.success('分配权限成功')
        this.getRolesList()
        this.setRightDialogVisible=false
      }
    }
  }

</script>

<style lang="less" scoped>
  .el-tag {
    margin: 7px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }

</style>
